| /* |
| * Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| * for details. All rights reserved. Use of this source code is governed by a |
| * BSD-style license that can be found in the LICENSE file. |
| */ |
| /** |
| * @assertion Iterable<E> where(bool test(E element)) |
| * ... |
| * Iterating will not cache results, and thus iterating multiple times over the |
| * returned [Iterable] may invoke the supplied function [test] multiple times |
| * on the same element. |
| * @description Checks that iterating multiple times over the the returned |
| * [Iterable] will invoke the supplied function [test] multiple times on the |
| * same element. |
| * @author msyabro |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var count = 0; |
| bool test(int e) { |
| ++count; |
| return true; |
| } |
| |
| var list = new Uint64List.fromList([1, 2, 3]); |
| var res = list.where(test); |
| |
| res.elementAt(0); |
| Expect.equals(1,count); |
| |
| res.elementAt(0); |
| Expect.equals(2,count); |
| |
| res.elementAt(1); |
| Expect.equals(4,count); |
| |
| res.elementAt(2); |
| Expect.equals(7,count); |
| } |